Written for one-semester non-majors in marine biology or a field-related marine biology course at any two- or four-year school, this text explores ocean ecology. It looks at how organisms interact with each other and the environment. Phonetic pronunciations are provided for difficult terms and names of organisms throughout the text and selected key terms have page references and provide a reviewing tool for learning the language of biology. End-of-chapter questions are provided at three levels - multiple choice, short answer and thinking critically - allowing students to test their understanding in a variety of ways.